Evoke all the positive.
Recall all the good things that happened in your past. It will boost your confidence and will make you feel proud about your achievements. It will also encourage you to do better in the future.
Learn from the negative.
When you think of the mistakes you have done in your past, you need not feel bad. Everyone makes mistakes. Yet, you mustn’t dismiss the mistakes from your mind. But, learn from them. Find out where you went wrong and improve yourself.